Elsewhere, seven people suffered minor injuries in a boat-ride mishap at the Cedar Point amusement park in Sandusky, Ohio, park officials said.

The incident occurred Friday evening when a boat rolled backwards down a lift hill on the Shoot the Rapids ride, park spokesman Bryan Edwards said in an e-mailed statement.

The seven people in the boat were evaluated and treated by Cedar Point emergency medical staff, Edwards said. One of the seven was taken to an area hospital for additional evaluation and was subsequently released, he said.

"Shoot the Rapids will remain closed until park officials and inspectors from the state of Ohio complete their review," Edwards said.